Massage gun



FIG. 1 is a perspective view of a massage gun showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The evenly spaced broken lines in the drawings represent portions of the massage gun that form no part of the claimed design. The uneven dot-dash broken lines in the drawings represent a boundary line that form no part of the claimed design. The lighter shaded portions of the massage gun shown within the uneven dot-dash boundary lines form no part of the claim design. 

CLAIM The ornamental design for a massage gun, as shown and described. 